\section{Functional Patterns}
\label{sec:function}

Per category, what are the functional uses 



\begin{figure*}[htbp] \begin{center}
\includegraphics[width=6in,type=pdf,ext=.pdf,read=.pdf]{figs/cat.usage.gnu} \caption{Usage per project category in node-hours in DETER}
\label{catusage} \end{center} \end{figure*}

\begin{figure*}[htbp] \begin{center}
\includegraphics[width=6in,type=pdf,ext=.pdf,read=.pdf]{figs/cat.usage.emu.gnu} \caption{Usage per project category in node-hours in Emulab}
\label{catusage} \end{center} \end{figure*}
